Product Summary

The MAX3483, MAX3485, MAX3486, MAX3488, MAX3490, and MAX3491 are 3.3V, low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and one receiver. The MAX3483 and MAX3488 feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The partially slew-rate-limited MAX3486 transmits up to 2.5Mbps. The MAX3485, MAX3490, and MAX3491 transmit at up to 10Mbps.

Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if both inputs are open circuit.

The MAX3488, MAX3490, and MAX3491 feature full-duplex communication, while the MAX3483, MAX3485, and MAX3486 are designed for half-duplex communication.

Parametrics

Type Transceiver
Protocol RS422, RS485
Number of Drivers/Receivers 1/1
Duplex Half
Receiver Hysteresis 50mV
Data Rate 10Mbps
Voltage - Supply 3 V ~ 3.6 V
Operating Temperature 0°C ~ 70°C
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC N

Features

Operate from a Single 3.3V Supply-No Charge Pump!
Interoperable with +5V Logic
8ns Max Skew (MAX3485/MAX3490/MAX3491)
Slew-Rate Limited for Errorless Data Transmission (MAX3483/MAX3488)
2nA Low-Current Shutdown Mode (MAX3483/MAX3485/MAX3486/MAX3491)
-7V to +12V Common-Mode Input Voltage Range
Allows up to 32 Transceivers on the Bus
Full-Duplex and Half-Duplex Versions Available
Industry Standard 75176 Pinout (MAX3483/MAX3485/MAX3486)
Current-Limiting and Thermal Shutdown for Driver Overload Protection

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
MAX3485CSA+
MAX3485CSA+

Maxim Integrated Products

RS-422/RS-485 Interface IC 3.3V 10Mbps Transceiver

Data Sheet

0-1: $2.67
1-25: $1.78
25-50: $1.28
50-250: $1.26
MAX3485CSA+T
MAX3485CSA+T

Maxim Integrated Products

RS-422/RS-485 Interface IC 3.3V 10Mbps Transceiver

Data Sheet

0-2080: $1.12
2080-2500: $1.12
MAX3485CSA-T
MAX3485CSA-T

Maxim Integrated Products

RS-422/RS-485 Interface IC

Data Sheet

Negotiable 
MAX3485CSA
MAX3485CSA

Maxim Integrated Products

RS-422/RS-485 Interface IC

Data Sheet

Negotiable